# a = {'中国': 'China', '苹果': 'apple', '香蕉': 'banana', 'age': 90}
# a['日本']='jian'
# print(a)
# b = {'c': 1}
# a.update(b)
#
# a.pop('日本')
#
# l = len(a)
# print(l)
# a['c'] = '34'
# print(a)
# print(a.get('中国'))
# print(a['中国'])
#
# print(a.keys())
# a = ['jd', 90, 382, 'SSD', '咖啡大师']
# print(a[2])
# a.insert(1,'hello')
# print(a)
# b = [12, 'fe']
# a.extend(b)

# a.pop(2)
# print(a)
# a.remove('jd')
# print(a)

# a = [1,2,43,63,23,41,47,23,4,3,3]
# a.sort(reverse=True)
# print(a)
# b= a.count(3)
# print(b)
# c = a.index(43)
# print(c)
# d = a.copy()
# print(d)
